Does replacement 12 v coil for front dist. needs a resis

so I went to Tractor supply and bought a replacement 12volt coil for my 8N that had a original 6 volt .and just got tractor and dont now
why but there is a white creamic resistor { the kind you see on older 60's cars on firewall} and mounted close to key . So all I want to know
is if this 12 volt Tractor Supply Coil pack uses a resistor or not? There is no where that it says use a external resitor or not needed
...For Christ sake is it that hard for then to print that information on the box ...?? really ?? you know there is a big difference they
could place a piece of paper inside box or PRINT it on box...hate them dog food selling TSC's, thats all there good for ...they should
change there name to Dog Food Supply...so do I need to drop the voltage or not ? thanks ahead for answers

(quoted from post at 16:44:09 08/07/21) so I went to Tractor supply and bought a replacement 12volt coil for my 8N that had a original 6 volt .and just got tractor and dont now
why but there is a white creamic resistor { the kind you see on older 60's cars on firewall} and mounted close to key . So all I want to know
is if this 12 volt Tractor Supply Coil pack uses a resistor or not? There is no where that it says use a external resitor or not needed
...For Christ sake is it that hard for then to print that information on the box ...?? really ?? you know there is a big difference they
could place a piece of paper inside box or PRINT it on box...hate them dog food selling TSC's, thats all there good for ...they should
change there name to Dog Food Supply...so do I need to drop the voltage or not ? thanks ahead for answers
<img src=https://www.yesterdaystractors.com/cvphotos/cvphoto96718.jpg>

Click to expand...

wish I got a dollar every time this question is posted! No white ceramic IF you use the original 12250 Ford resistor.

yes in my parts manuals I show that pat number also ,but everywhere I see it they call it a resistor..and here these guys claim it is a
Thermistor that changes in valu from .03 ohm to 1.7 ohm.. so do you really know if that is true or not?

See if that coil crosses over to a NAPA IC14SB
That coil has 3.25 ohms internal resistance and works well without a external resistor

(quoted from post at 20:41:24 08/07/21) yes in my parts manuals I show that pat number also ,but everywhere I see it they call it a resistor..and here these guys claim it is a
Thermistor that changes in valu from .03 ohm to 1.7 ohm.. so do you really know if that is true or not?

Click to expand...

irst, a thermistor is a resistor, just with special characteristics. Yes, 12250 is a thermistor. How would I know? Well those 0.3 to 1.7 numbers come from measurements made by me over a decade ago & are now widely dispersed. And you can disregard the IC14B comment as it has no relevance to your front mount distributor tractor. You seem hell-bent on wanting to use the white ceramic resistor of unknown value...........I say have at it. Maybe it will work. Maybe it will work sometimes & not under other conditions. Maybe all the conditions. Maybe not. Do you want to learn or just enjoy debate?

(quoted from post at 01:03:44 08/08/21) See if that coil crosses over to a NAPA IC14SB
That coil has 3.25 ohms internal resistance and works well without a external resistor

Click to expand...

No it does not cross to an IC14SB. More on this on the Ford 9N, 2N, 8N forum.

Ha! I wouldn't buy dog food, a nut, bolt,(same with Fastenal) or any tractor part at TSC. They are an overpriced, overstocked, hardware store with pet food and clothes. Years ago TSC did stock quality tractor parts (TISCO), implements, and parts but no longer since they had new owners take over and don't know diddly squat about anything. You doubt? Ask our TSC clerk that resistor question. See? The most misunderstood features on old FORDs are the 6V/POS GRN electrical system and the Front Mount Distributor. If you force-mount the Front Distributor down, the second you apply power you will bust the aluminum base and render it useless junk. The distributor must be tuned up off the tractor and on your bench. Points (Blue Streak) set and timed correctly, unit tested then mounted correctly. The FORD Front Distributor uses the 12250 Ballast Resistor REGARDLESS if you use the OEM 6V/POS GRN system or do a 12V switch-over job. IF you plan on doing a 12C switch-over job, and plan on using your OEM 6V coil, then you must add an inline 1-OHM (white ceramic style typical) external resistor in the coil circuit. You can omit the extra resistor (my personal preference) simply by replacing the 6V coil with a 12V coil. With a 12V conversion, you remove the GEN and the VR from the circuit and replace with a 12V battery and an ALT. Regardless if 6V (GEN & VR) or 12V (ALT) you must use a fan belt tensioning device attached otherwise you will never charge the battery. ALL wiring must be correct including the proper battery cables.


FORD 8N TRACTOR WIRING DIAGRAMS:
PRIOR TO S/N 8N-263844:

FORD N-TRACTOR FRONT MOUNT DISTRIBUTOR:

HOW TO SET TIMING:

RESULTS WHEN UNIT IS MOUNTED 180 OFF:

FORD 8N-SERIES TRACTOR OEM 6V/POS GRN WIRING PICTOGRAM:

FORD 8N TRACTOR w/FRONT MOUNT -12v CONVERSION:

*NOTE: With an OEM 6V coil, you must add an inline 1-OHM external resistor in the circuit labeled the BROWN wire in pictogram. If you opt to swap out the 6V coil with a 12V coil the extra resistor is not used.



*PICTOGRAMS courtesy of JMOR

FORD OEM BALLAST RESISTOR -USED ONLY WITH FRONT MOUNT DISTRIBUTOR:

HELP: The LH resistor Terminal Post connects to the COIL Stud Terminal Post as you face the back off dash. OEM Wiring is RED.

EXTERNAL 1-OHM CERAMIC RESISTOR - USED ON FRONT MOUNT 12V CONVERSION ONLY IF THE COIL IS 6V:


FORD TRACTOR FRONT MOUNT DISTRIBUTOR FIRING ORDER; 1,2,4,3 CCW:


Breaker Points/Front Mount = .015; Spark Plugs Champion H12 or AUTO-LITE 437 14mm gap at .025-.028; Firing Order: 1, 2, 4, 3 CCW.



FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:



Tim Daley(MI)